Phil Savoie / Harebell carpenter bee (Chelostoma campanularum) at 4-5mm long one of Britain's smallest bees, visiting Giant harebell (Campanula latifolia) to collect pollen, Pentwyn farm SSSI, Gwent Wildlife Trust, Reserve, Monmouthshire, Wales, UK, July.

Phil Savoie / Harebell carpenter bee (Chelostoma campanularum) at 4-5mm long one of Britain's smallest bees, visiting Giant harebell (Campanula latifolia) to collect pollen, Pentwyn farm SSSI, Gwent Wildlife Trust, Reserve, Monmouthshire, Wales, UK, July.

Paul Hobson / Harvest mouse (Micromys minutus) on barley cereal, Yorkshire, UK Captive

Loic Poidevin / Muskrat (Ondatra zibethicus) feeding at hole bt water. Breton Marsh, West France, September.

Colin Varndell / Harvest mouse (Micromys minutes soricinus) viewed from above, captive, UK, April 2012

Eric Baccega / Muskrat (Ondatra zibethicus) walking on snow, Quebec, Canada

Colin Varndell / Harvest mouse (Micromys minutus soricinus) feeding on blackberry, captive, Dorset, UK, October

Klaus Echle / Common brown rat (Rattus norvegicus) in vaulted building. Black Forest, Germany, August.

Fabrice Cahez / Muskrat (Ondatra zibethicus) at water surface. River Allier, France, April.

Daniel Heuclin / Southern giant slender-tailed cloud rat (Phloeomys cumingi) in tree, from Provinces of Quezon, Laguna, Batangas, Sursogo, Philippines. Captive, Vulnerable species

David Kjaer / Harvest Mouse ( Micromys minutus) feeding on ear of wheat, Captive, UK, August

Rolf Nussbaumer / Texas Rat Snake (Elaphe obsoleta lindheimeri) with mouth open in defense posture, Fennessey Ranch, Refugio, Coastal Bend, Texas Coast, USA

Stephen Dalton / Brown rat (Rattus norvegicus) backlit, portrait, controlled conditions, UK

Stephen Dalton / Brown rat (Rattus norvegicus) and cheese grater, UK, controlled conditions